Re: HP 180A Oscilloscope.
THe 1820 was the very basic entry-level timebase. It's far out-numbered by the 1821 dual timebase, so model specific spares will be a lot harder to find. The C suffix means it's one of the last updates.
HP did some dual timebases that were rather covert to not intimidate people, they had controls putting it over as an 'expansion' function.
The need for a simpler timebase was limited because any firm prepared to stump up the prices of a 180 system was going to want to go all the way.
The way round is to simply learn which controls to park and not use, then the 1821 drives just like the 1820. Eventually you'll come across something the delayed timebase will make easier and then you find that the second timebase drives just like the first one and you only have to worry about the delay setting on the multi turn pot. You set the scope to run normally, with just a bright-up on the traces at the time the delayed timebase will run. Select the delayed timebase and there you are! The delay pot allows you to scroll through the whole waveform the first timebase is covering.
It's do-able in small, gentle steps.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
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